netdev - [PATCH v3 net-next 07/13] ipv6: drop metadata dst in ip6_route

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Message-Id: <a6ec60f8a70a710f8a92f723ec4bd1016ea4ea22.1440071726.git.jbenc@redhat.com>
Date:	Thu, 20 Aug 2015 13:56:26 +0200
From:	Jiri Benc <jbenc@...hat.com>
To:	netdev@...r.kernel.org
Cc:	Thomas Graf <tgraf@...g.ch>, Wei-Chun Chao <weichunc@...mgrid.com>
Subject: [PATCH v3 net-next 07/13] ipv6: drop metadata dst in ip6_route_input

The fix in commit 48fb6b554501 is incomplete, as now ip6_route_input can be
called with non-NULL dst if it's a metadata dst and the reference is leaked.
Drop the reference.

Fixes: 48fb6b554501 ("ipv6: fix crash over flow-based vxlan device")
Fixes: ee122c79d422 ("vxlan: Flow based tunneling")
CC: Wei-Chun Chao <weichunc@...mgrid.com>
CC: Thomas Graf <tgraf@...g.ch>
Signed-off-by: Jiri Benc <jbenc@...hat.com>
Acked-by: Thomas Graf <tgraf@...g.ch>
---
 net/ipv6/route.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/net/ipv6/route.c b/net/ipv6/route.c
index e6bbcdee7707..0947ad0b3de8 100644
--- a/net/ipv6/route.c
+++ b/net/ipv6/route.c
@@ -1140,6 +1140,7 @@ void ip6_route_input(struct sk_buff *skb)
 		.flowi6_proto = iph->nexthdr,
 	};
 
+	skb_dst_drop(skb);
 	skb_dst_set(skb, ip6_route_input_lookup(net, skb->dev, &fl6, flags));
 }
 
-- 
1.8.3.1

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